Mixed martial arts (MMA) is a full contact combat sport that allows a wide variety of fighting techniques, from a mixture of martial arts traditions and non-traditions, to be used in competitions. The rules allow the use of striking and grappling techniques, both while standing and on the ground. Such competitions allow martial artists of different backgrounds to compete. The term may also be used, less correctly, to describe hybrid martial arts styles.

Modern mixed martial arts competition emerged in American popular culture in 1993 with the founding of the Ultimate Fighting Championship. Initially based on finding the most effective martial arts for real unarmed combat situations, competitors of various arts were pitted against one another with minimal rules for safety. In the following decade, MMA promoters adopted many additional rules aimed at increasing safety for competitors and to promote mainstream acceptance of the sport. Following these changes, the sport has seen increased popularity with pay per view reach rivaling boxing and professional wrestling.

Rules
The rules for modern mixed martial arts competitions have changed significantly since the early days of vale tudo, Japanese shoot wrestling, and UFC 1, and even more from the historic style of pankration. As the knowledge about fighting techniques spread among fighters and spectators, it became clear that the original minimalist rule systems needed to be amended. The main motivations for these rule changes were protection of the health of the fighters, the desire to shed the image of "barbaric, no rules, fighting-to-the-death" matches, and being recognised as a sport.

The new rules included the introduction of weight classes; as knowledge about submissions spread, differences in weight had become a significant factor.

Small, open-fingered, gloves were introduced to protect fists in punches, reduce the occurrence of cuts (and stoppages due to cuts) and encourage fighters to use their hands for striking to allow more captivating matches. Time limits were established to avoid long fights with little action where competitors conserved their strength. Matches without time limits also complicated the airing of live events. Similar motivations produced the "stand up" rule, where the referee can stand fighters up if it is perceived that both are resting on the ground or not advancing toward a dominant position.

Gloves were first mandatory in Japan's Shooto promotion and were later adopted by the UFC as it developed into a regulated sport. In the U.S., state athletic and boxing commissions have played a crucial role in the introduction of additional rules because they oversee MMA in a similar way to boxing. Smaller shows may use more restrictive rules because they have less experienced fighters. In Japan and Europe, there is no regulating authority over competitions, so these organizations have greater freedom in rule development and event structure.

Victory in a match is normally gained either by the judges' decision after an allotted amount of time has elapsed, a stoppage by the referee (for example if a competitor can not defend himself intelligently) or the fight doctor (due to an injury), a submission, by a competitor's cornerman throwing in the towel, or by knockout.

Strategies
The techniques utilized in mixed martial arts competition generally fall into two categories: striking techniques (such as kicks, knees and punches) and grappling techniques (such as clinch holds, pinning holds, submission holds, sweeps, takedowns and throws). The first ever and largest MMA Sanctioning body in the world today is the International Sport Combat Federation (ISCF). Although sanctioning bodies such as the ISCF have rules and regulations for MMA, rules may vary between promotions. While the legality of some techniques (such as elbow strikes, headbutts and spinal locks) may vary, there is a near universal ban on techniques such as biting, strikes to the groin, eye-gouging, fish-hooking and small joint manipulation.

Today, mixed martial artists must cross-train in a variety of styles to counter their opponent's strengths and remain effective in all the phases of combat. For instance, a stand-up fighter will have little opportunity to use their skills against a submission artist who has also trained in take downs. Many traditional disciplines remain popular as ways for a fighter to improve aspects of their game.

Popular discipline
Most 'traditional' martial arts have a specific focus and these arts may be trained to improve in that area. Popular disciplines of each type include:

• Stand-up: Various forms of boxing, kickboxing/Muay Thai and forms of full contact karate are trained to improve footwork, elbowing, kicking, kneeing and punching.
• Clinch: Freestyle, Greco-Roman wrestling, Sambo and Judo are trained to improve clinching, takedowns and throws, while Muay Thai is trained to improve the striking aspect of the clinch.
• Ground: Brazilian Jiu-Jitsu, shoot wrestling, catch wrestling, Judo and Sambo are trained to improve ground control and position, as well as to achieve submission holds, and defend against them.
Some styles have been adapted from their traditional form, such as boxing stances which lack effective counters to leg kicks and takedowns, or Judo techniques which must be adapted for No Gi competition. It is common for a fighter to train with multiple coaches of different styles or an organized fight team to improve various aspects of their game at once. Cardiovascular conditioning, speed drills, strength training and flexibility are also important aspects of a fighter's training. Some schools advertise their styles as simply "mixed martial arts", which has become a genre in itself; but the training will still often be split in to different sections, focusing on one of the three. While mixed martial arts was initially practiced almost exclusively by competitive fighters, this is no longer the case. As the sport has become more mainstream and more widely taught, it has become accessible to wider range of practitioners of all ages. Proponents of this sort of training argue that it is safe for anyone, of any age, with varying levels of competitiveness.

Sprawl-and-brawl
Sprawl-and-brawl is a stand-up fighting tactic that consists of effective stand-up striking, while avoiding ground fighting, typically by using sprawls to defend against takedowns.

A sprawl-and-brawler is usually a boxer, kickboxer, Thai boxer or full contact karate fighter who has trained in wrestling to avoid takedowns to keep the fight standing. Often, these fighters will study submission wrestling to avoid being forced into submission, should they find themselves on the ground. This style can be deceptively different from traditional kickboxing styles, since sprawl-and-brawlers must adapt their techniques to incorporate takedown and ground fighting defense.

Clinch fighting
Clinch fighting and dirty boxing are tactics consisting of using a clinch hold to prevent the opponent from moving away into more distant striking range, while also attempting takedowns and striking the opponent using knees, stomps, elbows, and punches. The clinch is often utilized by wrestlers that have added in components of the striking game (typically boxing), and Muay Thai fighters.

Wrestlers may use clinch fighting as a way to neutralize the superior striking skills of a stand-up fighter or to prevent takedowns by a superior ground fighter. The clinch of a Muay Thai fighter is often used to improve the accuracy of knees and elbows by physically controlling the position of the opponent.

Ground-and-pound
Ground-and-pound is a ground fighting tactic consisting of taking an opponent to the ground using a takedown or throw, obtaining a top, or dominant position, and then striking the opponent, primarily with fists and elbows. Ground-and-pound is also used as a precursor to attempting submission holds.

This style is used by wrestlers or other fighters well-versed in submission defense and skilled at takedowns. They take the fight to the ground, maintain a grappling position, and strike until their opponent submits or is knocked out. Although not a traditional style of striking (it was first demonstrated as an effective technique by UFC and Pride grand prix champion, Mark Coleman), the effectiveness and reliability of ground-and-pound has made it a popular tactic. Today, strikes on the ground are an essential part of a fighter's training.

Submission grappling
Apart from being a general martial arts term, submission grappling is also a reference to the ground fighting tactic consisting of taking an opponent to the ground using a takedown or throw and then applying a submission hold, forcing the opponent to submit. While grapplers will often work to attain dominant position, some may be more comfortable fighting from other positions. If a grappler finds themselves unable to force a takedown, they may resort to pulling guard, whereby they physically pull their opponent into a dominant position on the ground.

Submissions are an essential part of many disciplines, most notably Catch wrestling, judo, Sambo and Brazilian Jiu-Jitsu. They were popularised in early UFC by Ken Shamrock and Royce Gracie.

Lay-and-pray
Lay-and-pray is a pejorative term for a strategy whereby a fighter can control their opponent on the ground, but is unable to mount an effective offense. They simply seek to negate the offense of their opponent, "praying" for a decision victory. In some promotions, penalties may be imposed for lay-and-pray techniques if the referee determines that a fighter is stalling.

Source wikipedia